diff --git a/requirements.txt b/requirements.txt
index 3522d3feac..1fd14c7d28 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@
 boto==2.39.0
 ntplib==0.3.3
 # the libyaml bindings are optional
-pyyaml==3.11
+pyyaml==5.4
 # note: requests is also used in many checks
 # upgrade with caution
 requests==2.6.0